He is joined on stage by guest star Demi Lovato, who made her debut in last week's episode as Dani and can be seen in the trailer playing guitar.

Lambert will play the character of Elliott 'Starchild' Gilbert in the show.

"It was such a warm welcome on my first day on set," he has said. "The cast were so sweet and they have a family vibe so I instantly felt I was in a safe, creative place with them, and we jumped right in."

Glee is currently on a short hiatus following last night's episode 'The Quarterback', which aired as a tribute to the late Cory Monteith.

The show will return in the US with Lambert's debut episode on November 7.